Spin manipulation in a double quantum-dot-quantum-wire coupled system

S. Sasaki; S. Kang; K. Kitagawa; M. Yamaguchi; S. Miyashita; T. Maruyama; H. Tamura; T. Akazaki; Y. Hirayama; H. Takayanagi

doi:10.1116/1.2218866

Spin manipulation in a double quantum-dot-quantum-wire coupled system

S. Sasaki, S. Kang, K. Kitagawa, M. Yamaguchi, S. Miyashita, T. Maruyama, H. Tamura, T. Akazaki, Y. Hirayama, H. Takayanagi

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We have studied spin correlation in a double quantum-dot-quantum-wire coupled device revealed in low-temperature transport characteristics. We demonstrate nonlocal control of the Kondo effect in one dot by manipulating the spin states of the other. The modulation of the local density of states in the wire region due to the Fano-Kondo antiresonance and the Ruderman-Kittel-Kasuya- Yoshida exchange interaction are the two possible mechanisms underlying the observed features. When the dot states are indirectly probed in the side-coupled geometry, double suppression of the wire conductance is observed due to the Fano-Kondo antiresonance involving both dots.

Original language	English
Pages (from-to)	2024-2028
Number of pages	5
Journal	Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Volume	24
Issue number	4
DOIs	https://doi.org/10.1116/1.2218866
Publication status	Published - 2006 Jul
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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Cite this

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title = "Spin manipulation in a double quantum-dot-quantum-wire coupled system",

abstract = "We have studied spin correlation in a double quantum-dot-quantum-wire coupled device revealed in low-temperature transport characteristics. We demonstrate nonlocal control of the Kondo effect in one dot by manipulating the spin states of the other. The modulation of the local density of states in the wire region due to the Fano-Kondo antiresonance and the Ruderman-Kittel-Kasuya- Yoshida exchange interaction are the two possible mechanisms underlying the observed features. When the dot states are indirectly probed in the side-coupled geometry, double suppression of the wire conductance is observed due to the Fano-Kondo antiresonance involving both dots.",

author = "S. Sasaki and S. Kang and K. Kitagawa and M. Yamaguchi and S. Miyashita and T. Maruyama and H. Tamura and T. Akazaki and Y. Hirayama and H. Takayanagi",

note = "Funding Information: This work is financially supported by Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science. ",

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T1 - Spin manipulation in a double quantum-dot-quantum-wire coupled system

AU - Sasaki, S.

AU - Kang, S.

AU - Kitagawa, K.

AU - Yamaguchi, M.

AU - Miyashita, S.

AU - Maruyama, T.

AU - Tamura, H.

AU - Akazaki, T.

AU - Hirayama, Y.

AU - Takayanagi, H.

N1 - Funding Information: This work is financially supported by Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science.

PY - 2006/7

Y1 - 2006/7

N2 - We have studied spin correlation in a double quantum-dot-quantum-wire coupled device revealed in low-temperature transport characteristics. We demonstrate nonlocal control of the Kondo effect in one dot by manipulating the spin states of the other. The modulation of the local density of states in the wire region due to the Fano-Kondo antiresonance and the Ruderman-Kittel-Kasuya- Yoshida exchange interaction are the two possible mechanisms underlying the observed features. When the dot states are indirectly probed in the side-coupled geometry, double suppression of the wire conductance is observed due to the Fano-Kondo antiresonance involving both dots.

AB - We have studied spin correlation in a double quantum-dot-quantum-wire coupled device revealed in low-temperature transport characteristics. We demonstrate nonlocal control of the Kondo effect in one dot by manipulating the spin states of the other. The modulation of the local density of states in the wire region due to the Fano-Kondo antiresonance and the Ruderman-Kittel-Kasuya- Yoshida exchange interaction are the two possible mechanisms underlying the observed features. When the dot states are indirectly probed in the side-coupled geometry, double suppression of the wire conductance is observed due to the Fano-Kondo antiresonance involving both dots.

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JF - Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures

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Spin manipulation in a double quantum-dot-quantum-wire coupled system

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